By Fischer Manfred   Fröhlich Josef   Gassler Helmut   in Regional Studies: The Journal of the Regional Studies Association

ISSN:1360-0591|28|1|1-12

Routledge Ltd‎(1994)‎

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By Gassler Helmut   Frohlich Josef   Kopcsa Alexander   in International Journal of Technology Management

ISSN:0267-5730|11|3-4|329-342

Inderscience Publishers‎(1996)‎

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